Electric-lamp socket.



P. BARR. ELECTRIC LAMP SOCKET.

APPLICATION FILED AUG.

mm Feb. 18, 1913.

42 Frederic Barr,

IIgVESSES 2 Q,

mm; fsareis r grnnr 'ormosrnsnemc BARE, or new Yoim, my.

'ELECTRIC-LAMP SOCKET.

Specification of Letters I'utent.

Patented Feb. 18. 1913.

Application filed August 5, 1911. Serial No. 642,509.

To all whom it may concern:

Be it known that l, Fnnonmc BARR, a citi Zen of the United States, and resident of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Electric-LaI-np Sockets, of which the following is a specification. t v

'1 This invention relates particularly to im provements in means for" connecting and housing the chain of what is commonly life particularly of the oscillating lever and the center lamp contact.

'- Another ()bJBOtis to hold the parts in proper alinement atall times.

Another object is to insure a perfect contact for the center of alamp.

.The invention contemplates the mounting of the switch contacts and operating mechanism between two porcelain blocks which form'between them a channel for the oscil- Iating lever and operating chain. The opcrating lever has a specially formed lug to which the chain isattaehed and a finger for preventing accidcnlhl disengagement of the chain. The lower end of thc'spindle on which the operating parts aremountcd is rigidly secured to the lower p rn'cclain block and the upper end is housed in a recess in the upper porcelain block. The center lamp contact has a 'reflexcd spring arm and an extended base portion with cminectiug bonds which attord a maximum of resiliency with a minimum of strain. 'l1ic lowe r porcelain block is so formed as to insulate the center lamp contact from the center spindle and from the screw socket terminal of the lamp.

Figure 1, 15 11 plan v ew of a socket cmbodying the improvements oi inyinveiition. Fig. 2, is a front view and partial vertical scctimi of they same showing thecentcr lamp coiltaot, spindle and switch operating mechanism. Fig. 3', is a rear view and partial vertical section showing the rotating switch nicnininaiul the conncctmn between" the upper and lower porcelains. Fig. 4, is ahorizontalscction and plan on the plane of the line X X of Fig. 3. Fig. 5, is a side view showing the oscillating member and chain moved into a position to permit of disengagement'of the chain. Fig. 6, is an enlarged detail perspective view of the oscillating lever and its hub. l"i'g. 7, is a plan view of the oscillating lever showing the log .to which the chain is to be attached laid out in the plane of the armjof the lever. Fig. 8, is a bottom view of a socket, the center lamp contact being removed to show the construction of the lower side of theporcelain.

Fig. 9, is a detail perspective view of the center lamp contact.

The term porcelain .will be used herein todesignate the insulating material since that is the term commonly used. It should betund erstood however,'that any equivalent material is intended to be'inclu'dcd on that term.

The lower porcelain 1 1s connected to theupper porcelain 2 for instance, by means of brackets 3 and 4 which constitute the circuit terminals; The screw socket 5 for the lamp (not shown) is connected to one of the brackets 23 and one of the switch contacts (3 is connected to the other bracket st. The other switch contact 7 isconncrtod to the center lamp contact 8. I

' The spindle!) passes through the lower porcelain 1 a'ndis rigidly secured thereto by means of a nut 10. The rotatable switch membei" 11 for conncctingand disconnecting the switch contacts (5 and 7 is carried by a porcelain disk 12 which is rotatable on the spindle 9. Connected to the carrier 19. in any suitable manner so as to rotate therewith is a 'atchrt. disk 1? formed to operutcd step by step by the oscillation ol" the ratchet plate 1.4-. The ratchet plate or disk 14 is prctcrahly provided with a sleeve or tubular hub 15 which hasa' flange it) 'to 'maintain the parts in proper position. The

ratchet. disk 14 has an arm 1-7 which consti' 'tutes inconjunction therewith what may be termed the oscillating opcratiiu lever. Surrounding the tubular hub 14) is a helical.

spring 18 having one end engaging the arm 17 ot the lever and the other end engaging a toothed nutltl screwed on to the upper end IQU another as desired. -The tension of the spring, normally holds the operating lever 1? in contact with the ug-81 which projects downwardly from the upper )orcelain. Another similar 111g, 22 is provided 'i-Q limit. the oscillation of the lever-17 in the opposite directi n. i

The oscillating lever at its outer, end has a downwardly turned flange 25 to which the operating chain or cord 26 is attached. The flange 25 has an ear'bent inwardly as shown in Figs. 2, a and Gbenestli the edgeQB of the oscillating lever. lfhe flange 25 is provided with an opening 29 adapted to re ceire the end ball of the operating chain. A little to the rightof the centerfof the opcning'ilt) I have provided a downwardly projecting finger 30 bent inwardly and somewhat Wider at its lowen end, The spice between the tip of the finger 30 and th lower edge of the opening29 is 'just suthcient to permit the passage of. th {connection between two of the balls of it e op erating chain, when thechain is'tiltcd in the positionlshown in Fig.- 5. The-right hand end of the opening 29 is too when to permit the chain to pull out. -When the chain is in place therein, a poll upon the chain is transmitted to the ear 2? sn'dfp'uils the oscillating lever toward the, right. When the chain is released, the spring 18 throws the operating oscillating lever-and the chain back into thenormal position. This action has in the past in some constructions tended to disengage the chain' from the oscillating lever. The construction herein shown however, completely prevents such an accidental disengagement. The flange 31 ()1. the lower porcelain Serves to prevent the tilting up of the chain except when the oscillating lever is in the position shown in Fig. 5 where the end ball can pass into the upper cod of the recess 32. In such' a position the chain can be moved around to the left while the oscillating lever is held still and the chain thus discn aged. Such an action is ofcourse impossible when the parts of the socket are in the usual shell {not shown).

The lower part of the porcelain 1 is pro ided with a projecting rib portion which projects between the flange sectors 35, so 0"" he screw socket. The center lamp contact has a base plate portion 3? connect ed to the arm portion 38 by abend- 39 and the conlarlflportion '8 is connected to the arm 38 by the bent portion 40. The base portion 37 is adapted lobe secured in the recess ll in the lower porcelain. Around the recess in which the hub of the spindle 9 is located, 1'. preferably provide a. raised rim t) inunediatcly above the center lamp contact so as to insure the con'iplctc separasaid lever projecting into proximity porcelain base flange and having tion and insulation of the various, parts. Thev center lamp contact as shown, part1cularly in Fig.9, consists of the contactpor bend 40. Preferably the contlact portion l? is formed in the shape of a boss so as to give a somewhat rigid conlactsurfaoe even where the material used is rather, thin and light.

\Vhat I claim is 1. In a socketswitch, porcelain members having a channelformed between them, an

operating lever having a flange with an opening, a chain engaged therein, shoulders carried said lever and by one of said porcelain members to preventthe" withdrawal of the chain from the flange while the chain is in the channchstops for li1nii ing the oscillation of the lever, one of, said. porcelain members having a recess between said stops to receive the end of the chain and permit disengagement of said chain by an angular movement.

2. In a socket switch, a porcelain base having a flange around one side, a spindle carried by said base, a switch member and an oscillating operating lever mounted on said spindle, in flange on lhc'outer to said ing, a chainengaged in said open-mpg. and a finger projecting from one side of said opening toward the othcr'so as to form a narrow passage for'the chain connect on adjacent said porcelain base flange. said pas sage being so close to said base flange as to prevent the chain from being disengaged while said lever is in its normal position ofrest.

end of an open- -3. in a. switch socket. a porcelain base, a I

spindle and switch contacts carried thereb v a rotary switch member mounted on said spindle, an oscillating operatingl lever, an upwardly eatcndinotuhular hub tor said lever mounted on saidspimllc. a spring surrounding said spindle and hub and having one end engaging said lever. and an abut- -ment for the other end of said spring.

In a pull switch. an oscillating lever having a. flange with an opening for the. chain' and. a yielding linger projecting from one side of the opening toward the other and havingits-end bent inwardly from the flange and (iii-'idi'ng; the opening into two parts connected by a'narrow passage and a chain engaged in said opening, and yieldingly held by said linger.

In a pull switch, an oscillating lever having a flange with an opening for the, chain and a finger projecting froln'one side of the opening toward the other and widest having a ange with an opening or the.

1 ,ooaem near its free 'end and having its end bent" inwardly from the flange and dividing the opening into two parts connected by a narrow'passage and forming a V-sbaped socketand a chain yicldingly held in said socket by said finger.

6. In a ull switch, an oscillatin lever chain and a. finger projecting from one side of the opening toward the other and dividing the opening into two parts connected by a narrow passage and a chain engaged in said openin the chain holdin portion of the flange %eing bent inwardijv from the main portion of the flange and said finger standing behind the end ball of the chain.

7. In a pull switch, an insulating block having a eripheral flange and a head piece forming a 'lateral chain guiding groove, switch contacts located within said flange, a spindle'supported in said block, an oscillating lever on said spindle, an operating chain secured to said oscillating lever in said groove and an insulating disk on said spindle covering said switch contacts and separating said oscillating lever from said switch contacts and preventing said chain from engaging said contacts and terminal,

brackets connecting said block and head iece.

8. In a pull switch, an insulating block forined of two parts, having a narrow chain guiding and insulating groove open around one side between the parts, brackets connecting said parts, switch contacts mounted within the block, an oscillating lever pivoted within theblock and having its outer end projecting into said groove and an operating chain secured to the outer end of said lever and guided insaid groove and thereby kept from engagement with said contacts, said block having insulating lugs adjacent said brackets to serve as stops for said lever.

9. In a lamp socket, a porcelain base having a projecting rib on one end, a screw shell lamp terminal having a flange secured to said baseon opposite sides of said rib and a center lamp contact member having a base portion secured to said porcelain base between'the side flanges of said rib, a spring arm portion integral with the base portion and extending across the center of said rib and a contact portion reflexed over the spring arm portion. 1

10. In an electric pull switch, an insulating base block, stationary and movable switch contacts carried thereby, a spindle for the movable contact, an insulating disk on said spindle, overstanding the' stationary and movable contacts and operatively con-' nected with said movable contact, an oscillating ratchet lever on said spindle oper-i atively cbnnected with said insulating disk,

a pull chain connected to said lever, said insulating base block havlng an insulating to said lever and gui ed in said groove.

nange extending around the sides of said switch contacts and serving as'a chain rail, said insulating disk being interposed between said lever and said switch contacts, a second insulatin block and terminal l rack ets holding sai blocks spaced apart from each other. I a l i 11.- Inan electric pull switch, two insulating blocks, terminal brackets holding said blocks spaced apart, stationary and movable 5 switch contacts locatedtbctween said blocks,. an insulating flange extending around the outer edge at one side of one of said blocks toward the other block and guarding said contacts, an insulating disk covering said 8() switch contacts, an oscillating leverhaving its outer and extending beyond said disk" between said flange and the opposite block and a pull chain connected to the outerend of said oscillating lever and ided in-the 3 i:pacf: between Sflld flange and tlheopposite a oc I 12. In an electricpull switch, two insulating blocks, terminal brackets holding said blocks spaced apart, stationary and movable switch contacts located between said blocks, an insulating flange extending around the outeredge at one side of one of said blocks toward the other block and guarding'said contacts, an insulating disk covering said ,95

said oscillating lever and guided'in the space between'said flange'and theopposite I block, one of saidblocks having insu atin shoulders projecting toward the other bloc adjacent said brackets for limiting the movement'of said lever. a 1 5 '13.,In a pull switch, an insulating block a formedof two parts, having a narrow segmental annular-grooveo' e atera lly around, one side, terminal brac elk connecting the parts of said insulating bpck, switch con 10 tacts mounted within said bloclnan oscillating lever pivoted within said block and having one end projecting outward into, said groove and an o crating chain secured- 14. In a pull switch, a two-part insulating block, switch contacts contained therein, 'a spindle supported-in said block, an oscillating lever on isaidlspindle, anoperatlng chai'n'secured to the outer end of said lever, terminal brackets connecting the parts of v "said block, said blockhaving a se ental an -j nular groove open around one 91 eand insulating walls around said contacts and adjacent said. bra ckets, said chain andithe' outer end of said'osc'illating lever being. guided in said groove.

15. A 1pull switch, comprising a block 'formed 0 two insulating members, terminal brackets connecting said members, one of said members having a flange forming a ing means and the switch mechenism archamber, swlteh mechanism arranged wlthm ranged to prevent the chum from contactmg said chamber, sand block having a segmental wlt-h the swltch mecnamsm.

groove open around one side, metalllc 0per- FBEDERIC BARR. :mng means for said switch mechemsm in- Wxtnesses: cludlng a pull 01mm and an msulatmg mem- Rom. S. ALLYN,

per interposed between the metallic operat E. BRADFURD. 

